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Moxa MB3xxx Series Protocol Gateways Stack-Based Buffer Overflow (CVE-2019-9099)

critical Tenable OT Security Plugin ID 501442

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An issue was discovered on Moxa MGate MB3170 and MB3270 devices before 4.1, MB3280 and MB3480 devices before 3.1, MB3660 devices before 2.3, and MB3180 devices before 2.1. A Buffer overflow in the built-in web server allows remote attackers to initiate DoS, and probably to execute arbitrary code (issue 1 of 2).

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Moxa has developed the following solutions to address the vulnerabilities:

- MB3170 Series: Download the new firmware.
- MB3270 Series: Download the new firmware.
- MB3180 Series: Download the new firmware.
- Moxa also recommends users follow below instructions to mitigate potential risks:
- Upgrade to the latest firmware and disable HTTP and Telnet communications.
 - Use Moxa utilities (MGate Manager, NPort Administration Suite Utility) to change device configurations or monitor the device status remotely.
 - Use a VPN tunnel for a secure and protected connection between the devices and host PC.
- MB3280 Series: Download the new firmware.
- MB3480 Series: Download the new firmware.
- MB3660 Series: Download the new firmware.

Please see Moxa’s security advisory for more information.

See Also

http://www.nessus.org/u?6506053d

https://www.us-cert.gov/ics/advisories/icsa-20-056-01

Plugin Details

Severity: Critical

ID: 501442

Version: 1.5

Type: remote

Family: Tenable.ot

Published: 8/2/2023

Updated: 9/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2019-9099

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:moxa:mb3480_firmware, cpe:/o:moxa:mb3660_firmware, cpe:/o:moxa:mb3170_firmware, cpe:/o:moxa:mb3280_firmware, cpe:/o:moxa:mb3180_firmware, cpe:/o:moxa:mb3270_firmware

Required KB Items: Tenable.ot/Moxa

Exploit Ease: No known exploits are available

Patch Publication Date: 3/11/2020

Vulnerability Publication Date: 3/11/2020

Reference Information

CVE: CVE-2019-9099

CWE: 120

ICSA: 20-056-01